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- Question
In a row of boys, If A who is 10th from the left and B who is 9th from the right interchange their positions, A becomes 15th from the left. How many boys are there in the row ?
Options- A. 23
- B. 31
- C. 27
- D. 28
- Correct Answer
- 23
ExplanationClearly, A?s new position is 15th from the left. But this is the same as B?s earlier position which is 9th from the right.
- 1. How many 4's are there preceded by 7 but not followed by 3? 5 9 3 2 1 7 4 2 6 9 7 4 6 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1 8 7 4 6 3
Options- A. Four
- B. Three
- C. Six
- D. Five Discuss
- 2. How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order?
Options- A. None
- B. One
- C. Two
- D. Three Discuss
- 3. A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 9, 1331, 18, 121, 27, ?
Options- A. 19
- B. 11
- C. 17
- D. 13 Discuss
- 4. A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 3, 4, 12, 48, ?
Options- A. 426
- B. 576
- C. 467
- D. 512 Discuss
- 5. In the following question, select the missing number from the given series.47, 44, 40, 37, ?, 30
Options- A. 32
- B. 33
- C. 34
- D. 31 Discuss
- 6. Nitin ranks 18th in a class of 49 students. What is rank from the last ?
Options- A. 31
- B. 18
- C. 32
- D. 19 Discuss
- 7. Sam ranked 9th from the top and 38th from the bottom in a class. How many students are there in the class ?
Options- A. 45
- B. 47
- C. 46
- D. 48 Discuss
- 8. A class of boys stands in a single line, One boy is 19th in order from both the ends, How many boys are there in the class ?
Options- A. 37
- B. 39
- C. 27
- D. 38 Discuss
- 9. Three persons A, B and C are standing in a queue. There are five persons between A and B and eight persons between B and C. If there be three persons ahead of C and 21 persons behind A, what could be the minimum number of persons in the queue?
Options- A. 41
- B. 40
- C. 28
- D. 27 Discuss
- 10. How many such digits are there in the number 7346285 which are as far away from the beginning of the number, as they will be when arranged in ascending order within the number?
Options- A. None
- B. one
- C. Two
- D. Three Discuss
Time Sequence problems
Search Results
Correct Answer: Four
Explanation:
7 4 2
7 4 6
7 4 1
7 4 6
Only at these placees 4 is preceded by 7 but not followed by 3
Correct Answer: Three
Explanation:
Given Number: 4 2 1 5 7 9 3 6 8
Ascending order: 1 2 3 4 5 6 7 8 9
Hence the required pairs are 12, 49, 16
Correct Answer: 11
Correct Answer: 576
Correct Answer: 33
Correct Answer: 32
Explanation:
Number students behind the nitin in rank = (49 - 18) = 31
Nitin is 32nd from the last
Correct Answer: 46
Explanation:
Number of students in class = (8 + 1 + 37) = 46
Correct Answer: 37
Explanation:
Number of boys in the class = (18 + 1 +18) = 37
Correct Answer: 28
Explanation:
Three persons A, B, C can be arranged in a queue in six different ways, ie ABC, CBA, BAC, CAB, BCA, ACB. But since there are only 3 persons ahead of C, so C should be in front of the queue. Thus, there are only two possible arrangements, ie CBA and CAB.
We may consider the two cases as under:
Case I:
Clearly, number of persons in the queue = (3+1+8+1+5+1+21=) 40
Case II:
Number of persons between A and C
= (8 - 6) = 2
Clearly number of persons in the queue = (3+1+2+1+21) = 28
Now, 28 < 40. So, 28 is the minimum number of persons in the queue.
Correct Answer: Two
Explanation:
Given Number : 7346285
Ascending Number : 2345678
Answer is Two. Those digits are 3,4
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